Colin Gerald Ogden

• An atlas of freshwater testate amoebae
• Morphological studies on some Difflugiidae from Yugoslavia (Rhizopoda, Protoza )
• Observations in the systematics of nematodes belonging to the genus Syphacia Seurat, 1916
• Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa)